K-303
Quantitative Kerr characterization via the Mars–Simon tensor
partial Rigidity / Uniqueness
Statement
Turn the invariant characterization of Kerr by vanishing Mars–Simon tensor into a stable quantitative theorem with explicit constants.
Mathematical prerequisites
Invariant tensors; stationary Einstein equations; elliptic estimates; quantitative rigidity.
Why it matters
An exact characterization is powerful, but a stability theorem needs quantitative control.
Completion criteria
A complete answer must bound distance to Kerr in terms of an explicit norm of the Mars–Simon tensor and recover the nearby parameters effectively.
Implications if solved
Would produce a practical near-Kerr recognition theorem.
Last updated: 2026-04-05 ·
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